controlling-code-complexity

Guidance for keeping code complexity under control during implementation. It separates checks that can be automated from decisions that still require the developer’s judgment.

In plain words
What is it for?
Use it when defining or reviewing complexity checks, their inputs and boundaries, and the remaining design decisions an agent must make.
Why use it?
It helps prevent unnecessary complexity and makes the limits, prerequisites, evidence, and coverage of complexity checks explicit.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/nolane-x/forge-os/controlling-code-complexity
Any agent
npx skills add Nolane-x/forge-os --skill controlling-code-complexity
Clone the repo
git clone --depth 1 https://github.com/Nolane-x/forge-os

Made for: Claude Code, Codex.

Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 183 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00034 $0.00183
Opus 5 $0.00017 $0.00092
Sonnet 5 $0.00007 $0.00037
Haiku 4.5 $0.00003 $0.00018

Measured 2d ago against content hash 8f22bf20d677, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

controlling-code-complexity scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills-v2/l1/implementation/controlling-code-complexity/SKILL.md · 23 lines

What it actually says

Controlling Code Complexity

Core principle

Controlling code complexity within implementation lifecycle boundaries. Deterministic checks own scope, typed preconditions, evidence, and coverage; the agent performs only the domain judgment that cannot be encoded safely.

Do not activate when

  • the requested outcome does not require controlling code complexity within implementation lifecycle boundaries
  • the typed inputs for controlling-code-complexity are absent and another technique owns the outcome
Files

What ships with it

9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 23 lines · 34 tokens per session scan A 8f22bf20d677

Subscribe to this mod's changes

controlling-code-complexity is a skill published in the GitHub repository Nolane-x/forge-os (10 stars, last pushed 1mo ago), licensed MIT. It adds 34 tokens to every session and 183 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.